The Yankees have been searching for answers this season; their talented young right-hander Phil Hughes landed on the disabled list last month after his fastball was lifeless in three poor starts. "Dead-arm syndrome" varies so much in its degrees and its causes that even its name "has become sort of a bucket term," said Dr. Michael Hausman, the vice-chairman of orthopedics at The Mount Sinai Hospital. "It's not a precise diagnosis." Learn more.